CN111831012A - Intelligent adjustable air barrier system on bridge and control method thereof - Google Patents
Intelligent adjustable air barrier system on bridge and control method thereof Download PDFInfo
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- CN111831012A CN111831012A CN202010632074.2A CN202010632074A CN111831012A CN 111831012 A CN111831012 A CN 111831012A CN 202010632074 A CN202010632074 A CN 202010632074A CN 111831012 A CN111831012 A CN 111831012A
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- E—FIXED CONSTRUCTIONS
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- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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Abstract
The invention discloses an intelligent adjustable wind barrier system on a bridge and a control method thereof, wherein the rotation of a wind shield and the opening and closing angle of each movable blade are controlled according to the real-time wind speed detected by a wind speed detection sensor, the control on the height and the ventilation rate of each wind barrier unit is realized, each wind barrier unit is dynamically adjusted under different wind speeds to be in the optimal posture, and the requirements of vehicle driving safety, bridge safety and stability, wind barrier safety and stability, wide visual field and the like can be met.
Description
Technical Field
The invention belongs to the technical field of bridge wind barriers, and particularly relates to an intelligent adjustable wind barrier system on a bridge and a control method thereof.
Background
Currently, railway traffic plays a very important role in the development of economy in China. Referring to 'statistics bulletin of 2019 of China railway group Limited company', the total mileage of railway operation in China reaches 13.9 kilometers as long as 2019, wherein the total mileage of high-speed railways is 3.5 kilometers, and the urban railway station is the first to live in the world. The bridge is an important component of a railway transportation system and is an important structural facility for crossing the terrain of river and sea and canyon. Bridges and vehicles in river and sea and canyon areas are highly susceptible to wind loads. The influence of wind on an axle system needs to consider the flutter, the calm wind instability and the vehicle driving safety accident of the bridge under the condition of high wind speed; the condition that the vortex vibration occurs to the bridge under the condition of low wind speed is also considered, so that the running stability of the vehicle is influenced.
At present, the arrangement of a flow restraining plate at a bridge railing is an effective method for controlling the vortex vibration of a bridge at low wind speed. But at a high wind speed section, the bridge is not easy to generate vortex vibration. The flow restraining plate cannot play a good role in damping the bridge vibration, and even can reduce the calm wind stability of the bridge. Therefore, the conventional flow suppressing plate cannot cope well with the variation of the wind speed. Not only is the flow restraining plate in such a contradiction, but also the traditional wind barrier is in the problem of ensuring the safe running of the vehicle. According to the structural form of the wind barrier and previous researches, the wind permeability and the height of the wind barrier are important factors influencing the wind shielding effect, and the smaller the wind permeability and the higher the height of the wind barrier are, the better the wind shielding effect is, and the more safe driving is facilitated. But simultaneously, the section form of the bridge can be changed due to the small wind penetration rate and the high height, the flutter critical wind speed of the bridge is reduced, and the flutter stability of the bridge structure is greatly influenced. Moreover, the reliability of the wind barrier is closely related to the wind shielding effect, and the better the wind shielding effect is, the lower the reliability is. If the bridge is a sea-crossing bridge, the wind barrier can also block the view of passengers, influence the passengers to enjoy landscapes and reduce the attractiveness of the bridge. On the contrary, the ventilation rate of the wind barrier is increased, the height of the wind barrier is reduced, wind-induced vibration of the bridge can be reduced, the safety of the bridge and the wind barrier is improved, the visual field of passengers is widened, and the driving safety of vehicles can be reduced. Moreover, if the length of the bridge is too long, the wind speed along the direction of the bridge will change. However, the traditional wind barriers are uniformly arranged along the bridge, so that the wind barriers at some positions cannot well cope with the wind speed at the positions, the wind load borne by the train and the bridge is suddenly changed, and the train running and the bridge safety are influenced.
In order to solve the problems, the velcade et al provides a flutter active damping method of a large-span suspension bridge based on an adjustable-posture pneumatic wing plate, designs a flow-restraining plate with an adjustable posture, and the facility can control the flutter of the bridge at different wind speeds by actively adjusting the angle of the flow-restraining plate. However, the design only considers the flutter stability of the bridge, and the driving safety of the vehicle is not researched. The design method of the cross-sea bridge wind barrier is proposed by Gong Shang national et al, the concept of the wind speed reduction coefficient is proposed only from the perspective of vehicle driving safety, and the design of the wind barrier height and the wind penetration rate is carried out by using the coefficient, but the method does not consider the safety stability of the wind barrier and the bridge; moreover, the wind barrier is still a traditional static and passive wind-resistant facility and cannot cope with complex and variable wind fields. Lilongan et al propose a fully-automatic intelligent control bridge wind barrier, and design a wind barrier facility with adjustable wind penetration rate, which can adjust the wind penetration rate of the wind barrier according to the change of a wind field. However, the scheme cannot adjust the height of the wind barrier, and the posture adjustment mode of the wind barrier is single, so that the wind barrier cannot well cope with the condition of wide wind speed change range. Meanwhile, the safety of the vehicle and the bridge at high wind speed is only considered, and the safety of the wind barrier and the vortex-induced vibration of the bridge at low wind speed are not considered.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an intelligent adjustable air barrier system on a bridge and a control method thereof, aiming at solving the problem that the existing air barrier system can not simultaneously meet the requirements of a plurality of aspects such as vehicle driving safety, bridge safety and stability, air barrier safety and stability, wide visual field and the like.
The invention solves the technical problems through the following technical scheme: an on-bridge intelligent adjustable wind barrier system comprises a plurality of wind barrier units, wherein each wind barrier unit comprises a base, a stand column, a first cross beam, a rotating shaft, a second cross beam, a wind shield, a plurality of movable blades, a rotating mechanism, a wind speed detection sensor, a control device, a first driving device, a second driving device and a power supply device;
one end of the upright post is arranged on the base, the other end of the upright post is connected with the first cross beam, and the first cross beam is parallel to the base; one end of the rotating shaft is rotatably connected with the upright post, the other end of the rotating shaft is connected with the second cross beam, and the second cross beam is parallel to the first cross beam; the wind shield is arranged on the rotating shaft; a first rotating shaft and a second rotating shaft are respectively arranged at the two transverse ends of each movable blade, a slide way is arranged on the side surface of the upright post, the first rotating shaft is slidably arranged in the slide way, and the second rotating shaft is rotatably arranged on the side surface of the upright post or in the slide way; each movable blade is parallel to the length direction of the base; an output shaft of the first driving device is connected with the first rotating shaft through a rotating mechanism; the output end of the second driving device is connected with the rotating shaft;
the wind speed detection sensor, the control end of the first driving device and the control end of the second driving device are respectively and electrically connected with the control device, and the power supply device is respectively and electrically connected with the power end of the wind speed detection sensor, the power end of the first driving device, the power end of the second driving device and the power end of the control device.
According to the on-bridge intelligent adjustable wind barrier system, the rotation of a wind shield and the opening and closing angle of each movable blade are controlled according to the wind speed detected by the wind speed detection sensor, the height and the ventilation rate of each wind barrier unit are controlled, each wind barrier unit is dynamically adjusted at different wind speeds to be in the optimal posture, and the requirements of multiple aspects such as vehicle driving safety, bridge safety and stability, wind barrier safety and stability, wide visual field and the like can be met.
Further, every movable vane all includes movable vane and fixed vane, be connected through the articulated shaft between movable vane and the fixed vane movable vane is equipped with first pivot along articulated shaft length direction's one end fixed vane is equipped with the second pivot along articulated shaft length direction's one end, first pivot and second pivot all are on a parallel with the articulated shaft, and keep away from the articulated shaft setting.
The fixed blade is arranged on the side face of the stand column or in the slide way through the second rotating shaft, the movable blade is arranged in the slide way on the side face of the stand column through the first rotating shaft, the first rotating shaft slides along the slide way under the driving of the first driving device, the opening and closing angle between the movable blade and the fixed blade is controlled, and therefore the ventilation rate of the wind barrier unit is controlled, when the opening and closing angle between the movable blade and the fixed blade reaches 180 degrees, the ventilation rate of the wind barrier is minimum, when the opening and closing angle between the movable blade and the fixed blade reaches 0 degree, the ventilation rate of the wind barrier is maximum, and the control of the ventilation rate through the wind speed is realized.
Further, the rotating mechanism comprises a sliding rod, a main chain wheel, a driven chain wheel and a chain; the main chain wheel and the driven chain wheel are rotatably arranged on the side surface of the upright post, and the chain is wound on the main chain wheel and the driven chain wheel; the sliding rod is connected with the chain and the first rotating shaft of each movable blade; and the rotating shaft of the main chain wheel is connected with the output shaft of the first driving device.
The first rotating shafts of all the movable blades are connected with the sliding rods, under the action of the first driving device, the main chain wheel rotates, the driven chain wheel is driven by the chain to rotate, the sliding rods move under the driving of the chain, and therefore the first rotating shafts connected with the sliding rods are driven to move up and down along the sliding ways, and the opening and closing angle of the movable blades is controlled.
Further, the power supply device comprises a friction type nano generator, a storage battery, an emergency power supply and a power supply conversion module; the friction type nanometer generator and the emergency power supply are respectively and electrically connected with the storage battery, the input end of the power supply conversion module is respectively and electrically connected with the storage battery and the emergency power supply, and the output end of the power supply conversion module is respectively and electrically connected with the power end of the wind speed detection sensor, the power end of the first driving device, the power end of the second driving device and the power end of the control device.
The wind barrier unit is powered by the friction type nanometer generator, and the height and the wind permeability of the wind barrier unit can be controlled when no external power supply supplies power.
Preferably, the friction-type nano generator is embedded on the movable blade, and the storage battery is arranged on the base. The friction type nanometer generator is arranged on the movable blades, the wind power is large, and the generating efficiency is high.
Furthermore, a plurality of wind speed detection sensors are respectively arranged on the inner side and the outer side of the wind barrier unit, and the wind speed detection sensors arranged on the outer side of the wind barrier unit are far away from the wind barrier unit.
The inner side wind speed detection sensor is used for detecting the wind shielding effect of the wind barrier unit, the outer side wind speed detection sensor is used for detecting the real-time wind speed on the bridge, and the outer side wind speed detection sensor is far away from the wind barrier unit, so that the measured wind speed is not influenced by the wind barrier unit.
Furthermore, a steel wire is arranged between the base and the first cross beam at intervals of 0.5m along the vertical direction, so that the movable blades are prevented from being brought to a lane by wind when damaged, driving safety is influenced, and safety accidents are avoided.
The invention also provides a control method of the intelligent adjustable air barrier system on the bridge, which comprises the following steps:
step 1: detecting a real-time wind speed on the bridge;
step 2: the control device generates a control instruction according to the real-time wind speed and the optimal posture corresponding to different wind speeds, and sends the control instruction to the first driving device and the second driving device;
and step 3: the first driving device controls the opening and closing angle of the movable blade according to the control instruction, the ventilation rate of the wind barrier system is adjusted, and the second driving device controls the rotation of the wind shield according to the control instruction, the height of the wind barrier system is adjusted, so that the wind barrier system can reach the optimal posture.
According to the control method, the posture (namely the wind barrier height and the wind penetration rate) of the wind barrier system is adjusted under different wind speeds, so that the wind barrier system meets the requirements of driving safety, bridge safety, wind barrier system safety and wide visual field at the optimal posture; different wind speeds correspond to different optimal postures of the wind barrier system, the whole wind barrier system is composed of a plurality of wind barrier units, if the length of the bridge is too long, the wind speeds along the trend of the bridge are different, the wind barrier units at different positions at the same time possibly correspond to different wind speeds, therefore, even at the same time, the wind barrier units at different positions also have different optimal postures, the posture of the whole wind barrier system is dynamically adjusted according to the wind speed in a segmented manner, the system can reach the optimal posture, the requirements of driving safety, bridge safety, wind barrier system safety, wide visual field and the like can be met simultaneously, manual intervention is not needed in the middle process, automatic intelligent adjustment is realized, and the adjustment precision is high.
Further, in step 2, the adjusting process of the optimal posture corresponding to different wind speeds is as follows:
when the real-time wind speed is less than or equal to a first set wind speed, the movable blades are controlled to be completely closed, the wind penetration rate of the wind barrier system is made to be maximum, whether the real-time wind speed is in a vortex vibration wind speed interval or not is judged, and if the real-time wind speed is in the vortex vibration wind speed interval, the wind shield is controlled to be everted, so that the wind shield serves as a flow restraining plate; otherwise, the wind shield is positioned at the horizontal position, so that the height of the wind shield system is minimum;
when the first set wind speed is less than the real-time wind speed and less than or equal to the second set wind speed, the wind shield is controlled to be positioned at the horizontal position, the movable blade is completely closed, and then the opening and closing angle of the movable blade is adjusted, namely the wind penetration rate of the wind barrier system is adjusted to meet the driving safety requirement;
when the second set wind speed is less than the real-time wind speed, the wind shield is controlled to be located at the vertical position, the movable blade is completely opened, and then the position of the wind shield is adjusted, namely the height of the wind barrier system is adjusted to meet the requirements of traffic safety, bridge safety, wind barrier system safety and wide visual field.
In a low wind speed section, the driving is considered to be safe, only the bridge vortex vibration is controlled, and a wind shield is used as a flow suppression plate in a vortex vibration wind speed section, so that the purpose of suppressing the vortex vibration is achieved; in the middle wind speed section, the wind barrier system and the bridge are considered to meet the safety requirements, only the driving safety of the vehicle is judged, and the purpose of driving safety is achieved by adjusting the wind penetration rate; in the high wind speed section, the requirements of driving safety, bridge safety, wind barrier system safety, wide visual field and the like are met by adjusting the height; therefore, the optimal posture of the wind barrier system under different wind speeds can be obtained, and the optimal posture parameters are stored in the control device, so that the wind barrier system can be adjusted to the optimal posture according to the wind speeds.
Further, when the first set wind speed is less than the real-time wind speed and less than or equal to the second set wind speed, the set wind speed V is set1The initial value of the wind penetration rate D is a second set wind speed, the initial value of the wind penetration rate D is a maximum wind penetration rate, and the adjusting process of the wind penetration rate is as follows:
step 2.11, judging whether the vehicle is safe to drive, if not, increasing the opening and closing angle of the movable blade to enable D = D-delta D, wherein delta D is the adjustment quantity of the air permeability; otherwise, turning to step 2.12;
step 2.12 record the set wind speed V1The opening and closing angle of the lower movable blade is judged to set the wind speed V1Whether it is less than the first set wind speed, if not, V1=V1－ΔV1Let the air permeability D be the maximum air permeability and proceed to step 2.11, where Δ V1For setting wind speed V1The adjustment amount of (2); otherwise, turning to step 2.13;
step 2.13 setting different set wind speeds V1The opening and closing angle or the air permeability of the corresponding movable blade is stored in the control device, and the optimal air permeability of the wind barrier unit under different wind speeds in the section from the first set wind speed to the second set wind speed is obtained.
For a section from a first set wind speed to a second set wind speed (middle wind speed section), adjusting the air permeability at each set wind speed to obtain the safe maximum air permeability of the vehicle at the set wind speed, namely obtaining the optimal air permeability at each wind speed in the wind speed section, storing the optimal air permeability in a control device, and adjusting the opening and closing angle of the movable blade according to the real-time wind speed and the optimal air permeability corresponding to different set wind speeds to ensure that the wind barrier system keeps the optimal posture in the whole middle wind speed section and meet the driving safety requirement.
Further, when the second set wind speed is less than the real-time wind speed, the set wind speed V is set2The initial value of height H is the maximum height, i.e. the wind deflector is located in a vertical position, the adjustment process of the height of the wind barrier system is:
step 2.21, judging whether the bridge and the wind barrier system are safe, if not, adjusting the wind shield to enable H = H-delta H, wherein delta H is the adjustment quantity of the height of the wind barrier system; otherwise, turning to step 2.22;
step 2.22, judging whether the vehicle is safe to drive, and if so, adjusting a wind shield by considering the requirement of the visual field to enable H = H-delta H; otherwise, turning to step 2.23;
step 2.23, judging whether the vehicle driving safety judgment is carried out for the first time under the set wind speed, if so, closing the traffic, and controlling the wind shield to be positioned at the horizontal position and the movable blade to be completely closed when the wind speed is greater than or equal to the set wind speed; otherwise, turning to step 3.24;
step 2.24 recording the set wind speed V2The last height when the lower vehicle is not safe to drive is used for judging the set wind speed V2Whether the wind speed is greater than a third set wind speed, the third set wind speed is greater than a second set wind speed, if not, V2=V2+ΔV2Let the height H be the maximum height and proceed to step 2.21, where Δ V2For setting wind speed V2Otherwise, the step 2.25 is carried out;
step 2.25 setting different wind speeds V2The corresponding height of the wind barrier system is stored in the control device, namely the optimal height of the wind barrier unit under different wind speeds in the section from the second set wind speed to the third set wind speed is obtained.
And for the section from the second set wind speed to the third set wind speed, adjusting the height of the wind screen under each set wind speed to obtain the maximum height of the wide view, the bridge safety, the wind screen safety and the driving safety under the set wind speed, and obtaining the optimal height under each wind speed in the wind speed section, storing the optimal height in a control device, and adjusting the position of a wind shield according to the real-time wind speed and the optimal height corresponding to different set wind speeds to ensure that the wind screen system keeps the optimal posture in the whole high wind speed section and meet the requirements of the wide view, the bridge safety, the wind screen safety and the driving safety.
Advantageous effects
Compared with the prior art, the on-bridge intelligent adjustable wind barrier system and the control method thereof provided by the invention have the advantages that the rotation of a wind shield and the opening and closing angle of each movable blade are controlled according to the real-time wind speed detected by the wind speed detection sensor, the control on the height and the ventilation rate of each wind barrier unit is realized, each wind barrier unit is dynamically adjusted at different wind speeds to be in the optimal posture, and the requirements of multiple aspects such as vehicle driving safety, bridge safety and stability, wind barrier safety and stability, wide visual field and the like can be met.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a layout diagram of an intelligent adjustable wind barrier system on a bridge according to an embodiment of the present invention;
FIG. 2 is a control schematic diagram of an on-bridge intelligent adjustable wind barrier system in an embodiment of the present invention;
FIG. 3 is a three-dimensional view of an intelligent adjustable air barrier system on a bridge in an embodiment of the invention;
FIG. 4 is a three-dimensional assembly drawing of an intelligent adjustable wind barrier system on a bridge according to an embodiment of the present invention;
FIG. 5 is a side view of an intelligent adjustable wind barrier system on a bridge in an embodiment of the present invention;
FIG. 6 is an enlarged view of a movable blade in the embodiment of the present invention (an enlarged view of a dotted frame in FIG. 5);
FIG. 7 is a flow chart illustrating control of an on-bridge intelligent adjustable wind barrier system in an embodiment of the present invention;
FIG. 8 is a state diagram of the intelligent adjustable wind barrier system on a low wind speed section bridge according to an embodiment of the present invention, in which the windshields are turned outwards and the movable blades are fully closed;
FIG. 9 is a state diagram of the intelligent adjustable wind barrier system on a medium wind speed section bridge with the damper horizontal and the movable vanes fully open in an embodiment of the present invention;
FIG. 10 is a state diagram of the intelligent adjustable wind barrier system on a high wind speed section bridge with the windshields vertical and the movable blades fully open in an embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of a four-pylon cable-stayed bridge according to an embodiment of the invention;
the wind power generation device comprises a base 1, a stand column 2, a first cross beam 3, a rotating shaft 4, a second cross beam 5, a wind screen 6, a movable blade 7, a movable blade 701, a fixed blade 702, a first rotating shaft 703, a second rotating shaft 704, a rotating mechanism 8, a main chain wheel 801, a secondary chain wheel 802, a chain 803, a sliding rod 804, a slideway 9, an outer side wind speed detection sensor 10, an inner side wind speed detection sensor 11, a storage battery 12, a street lamp post 13, a contact net stand column 14 and a wind barrier unit 15.
Detailed Description
The technical solutions in the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, the intelligent adjustable wind barrier system on a bridge provided by the invention comprises a plurality of wind barrier units 15, wherein each wind barrier unit 15 comprises a base 1, a column 2, a first beam 3, a rotating shaft 4, a second beam 5, a wind shield 6, a plurality of movable blades 7, a rotating mechanism 8, a wind speed detection sensor, a control device, a first driving device, a second driving device and a power supply device; one end of the upright post 2 is arranged on the base 1, the other end of the upright post is connected with the first cross beam 3, and the first cross beam 3 is parallel to the base 1; one end of the rotating shaft 4 is rotatably connected with the upright post 2, the other end of the rotating shaft is connected with the second beam 5, and the second beam 5 is parallel to the first beam 3; the wind shield 6 is arranged on the rotating shaft 4; a first rotating shaft 703 and a second rotating shaft 704 are respectively arranged at the two transverse ends of each movable blade 7, a slideway 9 is arranged on the side surface of the upright post 2, the first rotating shaft 703 is slidably arranged in the slideway 9, and the second rotating shaft 704 is rotatably arranged on the side surface of the upright post 2 or in the slideway 9; each movable blade 7 is parallel to the length direction of the base 1; an output shaft of the first driving device is connected with the first rotating shaft 703 through the rotating mechanism 8; the output end of the second driving device is connected with the rotating shaft 4; the wind speed detection sensor, the control end of the first driving device and the control end of the second driving device are respectively electrically connected with the control device, and the power supply device is respectively electrically connected with the power end of the wind speed detection sensor, the power end of the first driving device, the power end of the second driving device and the power end of the control device.
As shown in fig. 1, a plurality of wind barrier units 15 are arranged in a row on two sides of a lane along the length direction of a bridge, each wind barrier unit 15 corresponds to a plurality of wind speed detection sensors, the wind speed detection sensors can select anemometers with corresponding models according to requirements, a plurality of wind speed detection sensors are respectively arranged on the inner side and the outer side of the wind barrier unit 15, the wind speed detection sensors arranged on the outer side of the wind barrier unit 15 are far away from the wind barrier unit 15, and the measured wind speed is guaranteed not to be influenced by the wind barrier unit 15. The inside wind speed detection sensor 11 is used for detecting the wind shielding effect of the wind barrier unit 15, the outside wind speed detection sensor 10 is used for detecting the real-time wind speed on the bridge, the inside wind speed detection sensor 11 and the outside wind speed detection sensor 10 can be respectively arranged on a contact net stand column 14 and a street lamp post 13 (a row of inside wind speed detection sensors 11 are arranged on the contact net stand column 14, and a row of outside wind speed detection sensors 10 are arranged on the street lamp post 13), and data lines used by the outside wind speed detection sensor 10 and the inside wind speed detection sensors 11 are respectively arranged together with the street lamp post 13 and wires in the contact net stand column 14 and are connected with the control device.
The power supply device comprises a friction type nano generator, a storage battery 12, an emergency power supply and a power supply conversion module; the friction type nanometer generator is electrically connected with the storage battery 12 through the rectifier, the emergency power supply is electrically connected with the storage battery 12, the input end of the power supply conversion module is electrically connected with the storage battery 12 and the emergency power supply respectively, and the output end of the power supply conversion module is electrically connected with the power end of the wind speed detection sensor, the power end of the first driving device, the power end of the second driving device and the power end of the control device respectively. The friction type nanometer generator is composed of a plurality of generating units, each generating unit is composed of a copper electrode and a perfluoro ethylene propylene film, the perfluoro ethylene propylene film vibrates with wind and rubs with the copper electrode to generate current and stores the current in the storage battery 12, the friction type nanometer generator is embedded on the movable blade 7, the wind power is large, the generating efficiency is high, and the storage battery 12 is arranged on the base 1. Each wind barrier unit 15 is powered by a friction type nano generator, and the height and the ventilation rate of the wind barrier unit 15 can be controlled when no external power supply supplies power.
The second driving device is two driving motors which are arranged in the first cross beam 3, the first cross beam 3 is of a hollow structure, an output shaft of the second driving device is connected with the rotating shaft 4, the rotating shaft 4 is controlled to rotate through controlling the driving motors, and therefore the position of the wind shield 6 is adjusted, and the height of the wind shield unit 15 is adjusted.
As shown in fig. 3-5, the rotating mechanism 8 includes a sliding bar 804, a master sprocket 801, a slave sprocket 802, and a chain 803; the main chain wheel 801 and the auxiliary chain wheel 802 are rotatably arranged on the side surface of the upright post 2, and the chain 803 is wound on the main chain wheel 801 and the auxiliary chain wheel 802; the sliding rod 804 is connected with the chain 803 and the first rotating shaft 703 of each movable blade 7; the shaft of the main sprocket 801 is connected to the output shaft of the first drive. The first rotating shafts 703 of all the movable blades 7 are connected with the sliding rods 804, under the action of a first driving device, the main chain wheel 801 rotates, the auxiliary chain wheel 802 is driven by the chain 803 to rotate, the sliding rods 804 move under the driving of the chain 803, so that the first rotating shafts 703 connected with the sliding rods 804 are driven to move up and down along the slide ways 9, the opening and closing angle control of the movable blades 7 is realized, and the first driving device can be a driving motor.
As shown in fig. 6, each of the movable vanes 7 includes a movable vane 701 and a fixed vane 702, the movable vane 701 is hinged to the fixed vane 702 through a hinge, a first rotating shaft 703 is provided at one end of the movable vane 701 in the length direction of the hinge shaft, a second rotating shaft 704 is provided at one end of the fixed vane 702 in the length direction of the hinge shaft, and the first rotating shaft 703 and the second rotating shaft 704 are both parallel to the hinge shaft and are disposed away from the hinge shaft. The fixed blades 702 are arranged on the side surface of the upright 2 (when each movable blade 7 corresponds to one slideway 9) and/or in the slideways 9 (when only one slideway 9 is arranged), when each movable blade 7 corresponds to one slideway 9, the length of each slideway 9 is adapted to the fully opened length of the movable blade 7, and the second rotating shaft 704 can be arranged in the corresponding slideway 9 or on the side surface of the upright 2; when all the movable blades 7 of one wind barrier unit 15 share one slide 9, the length of the slide 9 is adapted to the sum of the fully opened lengths of all the movable blades 7, and the second rotating shaft 704 is provided in the slide 9. The movable blade 701 is arranged in a slide way 9 on the side surface of the upright post 2 through a first rotating shaft 703, and the first rotating shaft 703 is connected with a slide bar 804, so that under the driving of a first driving device, the first rotating shaft 703 slides along the slide way 9, the opening and closing angle between the movable blade 701 and the fixed blade 702 is controlled, and the air permeability of the wind barrier unit 15 is controlled, when the opening and closing angle between the movable blade 701 and the fixed blade 702 reaches 180 degrees (completely opened), the air permeability of the wind barrier is minimum and 5%, when the opening and closing angle between the movable blade 701 and the fixed blade 702 reaches 0 degrees (completely closed), the air permeability of the wind barrier is maximum and 95%, and the control of the air permeability through the wind speed is realized. Considering the case where it is impossible to completely transmit wind or completely block wind, the minimum wind transmittance is 5%, the maximum wind transmittance is 95%, and it is impossible to be 0 or 100%. The air permeability can be calculated by installing wind speed sensors on the inner and outer sides of the movable blade 7, and the ratio of the difference between the wind speed detected by the outer wind speed sensor and the wind speed detected by the inner wind speed sensor and the wind speed detected by the outer wind speed sensor is the air permeability. For ease of installation and control, the rotation mechanism 8, the slideway 9, the first shaft 703 and the second shaft 704 are located on the same side of the upright 2.
In order to make the wind barrier unit 15 easy to install, less fragile and more practical, the components of the entire wind barrier unit 15 (including the chute 9, the sliding bar 804, the main sprocket 801, the sub sprocket 802, the chain 803, the first shaft 703 and the second shaft 704, etc.) are enclosed in the column 2, except for the movable blade 7. The movable blade 7 is a vulnerable part, and needs to be set to be an easily-installed and detachable structure, and can be directly replaced when being damaged. Set up a steel wire every 0.5m along vertical direction between base 1 and first crossbeam 3, be taken to lane department by wind when preventing movable blade 7 from damaging, influence driving safety, cause the incident.
The invention provides a control method of an intelligent adjustable air barrier system on a bridge, which is applied to the intelligent adjustable air barrier system on the bridge, and comprises the following steps:
1. real-time wind speed on the bridge is detected.
The outside wind speed detection sensor of each wind barrier unit 15 is used to detect the real-time wind speed on the bridge.
2. And the control device generates a control instruction according to the real-time wind speed and the optimal posture corresponding to different wind speeds, and sends the control instruction to the first driving device and the second driving device.
And comparing the real-time wind speed with the set wind speed, wherein when the real-time wind speed is consistent with the set wind speed, the optimal posture corresponding to the set wind speed is the target posture of the wind barrier unit 15, and the control device generates a control instruction to control the first driving device and the second driving device to act, so that the position of the wind shield 6 and the opening and closing angle of the movable blade 7 are adjusted, the wind barrier unit 15 is enabled to reach the target posture, and the requirements of driving safety, bridge safety, wind barrier system safety and wide visual field are met.
As shown in fig. 7, the adjustment process of the optimal attitude corresponding to different wind speeds is as follows:
(1) when the real-time wind speed is less than or equal to a first set wind speed (namely a low wind speed section), the movable blade 7 is controlled to be completely closed, so that the wind penetration rate of the wind barrier system is maximized, whether the real-time wind speed is in a vortex vibration wind speed interval or not is judged, and if the real-time wind speed is in the vortex vibration wind speed interval, the wind shield 6 is controlled to be turned outwards (as shown in a figure 8), so that the wind shield 6 serves as a current suppression; otherwise the wind deflector 6 is in a horizontal position (as shown in figure 9) to minimise the height of the wind barrier system.
In the low wind speed section, the driving safety (the driving safety is higher as the wind speed is lower), the bridge safety and the wind barrier safety are considered, only the bridge vortex vibration is controlled, and the wind shield 6 is used as a flow restraining plate in the vortex vibration wind speed section, so that the purpose of restraining the vortex vibration is achieved. The vortex vibration wind speed interval can be obtained through a bridge segment model wind tunnel vibration measurement test, and for the prior art, a wind tunnel test study on the pneumatic performance of a Liming, Sun Yanguo, Liming water, week strength, asymmetric II-shaped beam and a streamline box beam [ J ] vibration and impact, 2019,38(08):54-60. In the low wind speed section, the optimal attitude of the wind barrier system is: a. when the wind shield is not in the vortex vibration wind speed interval, the wind shield 6 is positioned at the horizontal position, so that the height of the wind barrier system is minimum, the movable blade 7 is completely closed, and the wind penetration rate (the visual field is wide) of the wind barrier system is maximum; b. in the interval of the vortex vibration wind speed, the wind shield 6 is turned outwards (in the embodiment, the optimal turning-outwards angle is 60 degrees between the wind shield 6 and the vertical line), so that the wind shield 6 is used as a flow restraining plate, the movable blade 7 is completely closed, and the ventilation rate of the wind barrier system is the maximum.
(2) When the first set wind speed is less than the real-time wind speed and less than or equal to the second set wind speed, the wind shield 6 is controlled to be located at a horizontal position, the movable blade 7 is completely closed (namely the initial value of the air permeability D is the maximum air permeability 95%), and then the opening and closing angle of the movable blade 7 is adjusted, namely the air permeability of the wind barrier system is adjusted to meet the driving safety requirement, as shown in fig. 9. Set the set wind speed V1The initial value of (a) is a second set wind speed, and the adjustment process of the air permeability is as follows:
step 2.11, judging whether the vehicle is safe to drive, if not, increasing the opening and closing angle of the movable blade 7 to enable D = D-delta D, wherein delta D is the adjustment amount of the ventilation rate, and in the embodiment, delta D is 15%; otherwise, go to step 2.12. And D = D-delta D is a cyclic execution process, when one adjustment is carried out, the ventilation rate D before adjustment is subtracted by the adjustment quantity delta D and then is given to D, at the moment, D is the ventilation rate after the adjustment, and when the next adjustment is carried out, D is the ventilation rate before adjustment, and the cycle is carried out in sequence until the condition is met.
Step 2.12 record the set wind speed V1The opening/closing angle of the lower moving blade 7 (i.e., the optimum air penetration rate at the wind speed) is determined, and the set wind speed V is determined1Whether or not less thanA first set wind speed (if less than the first set wind speed, a low wind speed section without adjusting the air permeability), and if not, V1=V1－ΔV1In this embodiment,. DELTA.V1At 2m/s, let the wind penetration D be the maximum wind penetration (ensuring that each set wind speed is adjusted from the maximum penetration), and go to step 2.11, where Δ V1For setting wind speed V1In the present embodiment, Δ V1Is 2 m/s; otherwise, go to step 2.13.
Step 2.13 setting different set wind speeds V1The opening and closing angle or the air permeability of the corresponding movable blade 7 is stored in the control device, that is, the optimal air permeability of the wind barrier unit 15 at different wind speeds in the section from the first set wind speed to the second set wind speed is obtained.
For a section from a first set wind speed to a second set wind speed (middle wind speed section), adjusting the air permeability (gradually reducing from the maximum air permeability (the movable blade 7 is completely closed)) at each set wind speed to obtain the safe maximum air permeability of the vehicle at the set wind speed, namely obtaining the optimal air permeability at each wind speed in the wind speed section, storing the optimal air permeability in a control device, and adjusting the opening and closing angle of the movable blade 7 according to the real-time wind speed and the optimal air permeability corresponding to different set wind speeds to ensure that the wind barrier system keeps the optimal posture in the whole middle wind speed section and meet the driving safety requirement.
The driving safety judgment process is as follows: measuring the aerodynamic parameters of the axle system through a bridge segment model wind tunnel vibration measurement test (reference document: Liyongle, huppon, Zhang Mingjin, Qianshi, wind-vehicle-axle system vehicle wind load sudden change effect wind tunnel test research [ J ]. aerodynamics report, 2011,29(05): 548-; calculating the vibration response of the vehicle by utilizing a wind-vehicle-rail-bridge coupling vibration calculation program according to the aerodynamic parameters; and finally, determining the train operation safety according to evaluation indexes in the railway vehicle dynamics performance evaluation and test identification specifications. The driving safety is judged to be the prior art.
(3) When the second set wind speed is less than the real-time wind speed, the wind shield 6 is controlled to be positioned at the vertical position (namely, the initial value of the height H is the maximum height), the movable blade 7 is completely opened,the position of the wind deflector 6 is adjusted again, i.e. the height of the wind barrier system is adjusted to meet the requirements of driving safety, bridge safety, wind barrier system safety and wide field of view, as shown in fig. 10. Set the set wind speed V2Is a second set wind speed, the process of adjusting the height of the wind barrier system is:
step 2.21, judging whether the bridge and wind barrier system is safe, if not, adjusting the wind shield 6 to enable H = H-delta H, wherein delta H is the adjustment quantity of the height of the wind barrier system, and delta H is 25cm in the embodiment, so that the safe maximum height of the bridge and the wind barrier system at the same time is obtained; otherwise, go to step 2.22.
Step 2.22, judging whether the vehicle is safe to drive, if so, adjusting the wind shield 6 in consideration of the vision requirement to ensure that H = H-delta H, and reducing the height of the wind barrier unit 15 under the condition of ensuring the driving safety so as to obtain the optimal height meeting the driving safety and vision widening requirements; otherwise, go to step 2.23.
Step 2.23, judging whether the vehicle driving safety judgment is carried out for the first time under the set wind speed, if so, closing the traffic, and controlling the wind shield 6 to be positioned at the horizontal position and the movable blade 7 to be completely closed when the wind speed is greater than or equal to the set wind speed; otherwise, go to step 3.24.
And 2.21, when the simultaneously safe maximum height of the bridge and the wind barrier is obtained, judging the driving safety, if the result of judging the driving safety for the first time is unsafe, indicating that the optimal height of the bridge safety, the wind barrier safety and the driving safety is not met simultaneously under the set wind speed, at this moment, in order to avoid safety accidents, closing the traffic, controlling the wind shield 6 to be positioned at the horizontal position to minimize the height of the wind barrier, controlling the movable blades 7 to be completely closed to maximize the wind penetration rate, and adjusting the wind barrier unit 15 according to the posture when the wind speed is larger than or equal to the set wind speed.
Step 2.24 recording the set wind speed V2The last height (the maximum height meeting the requirements of wide view and safe driving) when the lower vehicle is unsafe to drive is obtained, namely the optimal height meeting the requirements of wide view, bridge safety, wind barrier safety and safe driving is obtained, and the set wind speed V is judged2Whether or not toGreater than a third set wind speed, the third set wind speed is greater than the second set wind speed, if not, V2=V2+ΔV2In this embodiment,. DELTA.V2At 2m/s, the height H is set to the maximum height (ensuring that each set wind speed is adjusted from the maximum height), and the process goes to step 2.21, where Δ V2For setting wind speed V2Otherwise, go to step 2.25.
Step 2.25 setting different wind speeds V2The corresponding height of the wind barrier system is stored in the control device, i.e. the optimal height of the wind barrier unit 15 at different wind speeds in the section from the second set wind speed to the third set wind speed is obtained.
For the section from the second set wind speed to the third set wind speed (high wind speed section), the height of the wind screen is adjusted (gradually reduced from the maximum height (the wind shield 6 is located at the vertical position)) under each set wind speed, the maximum heights of the field of view, the bridge safety, the wind screen safety and the driving safety under the set wind speed are obtained, the optimal height under each wind speed in the wind speed section is obtained and stored in the control device, the position of the wind shield 6 is adjusted according to the real-time wind speed and the optimal heights corresponding to different set wind speeds, so that the wind screen system keeps the optimal posture in the whole high wind speed section, and the requirements of field of view widening, bridge safety, wind screen safety and driving safety are met.
Bridge safety is judged as the prior art, and references: li Ming, Sun Yan nation, Li Ming shui, Zhou Qiang, asymmetric II type roof beam and streamlined case roof beam aerodynamic performance wind tunnel test research [ J ]. vibration and impact, 2019,38(08):54-60 ], specifically: and (3) carrying out a wind tunnel vibration measurement test on the bridge segment model, and determining the safety of the bridge structure according to evaluation indexes in the wind resistance design specifications of the highway bridge.
Wind barrier safety was judged as prior art, reference: the method comprises the following steps of 1, clever rain, railway bridge wind barrier reliability research [ D ], university of continental maritime affairs, 2018, and specifically comprises the following steps: firstly, simulating and calculating the pneumatic parameters of the wind barrier through CFD numerical simulation, on the basis, performing dynamic response calculation on the wind barrier by using ANSYS, and finally determining the safety of the wind barrier according to evaluation indexes in Steel Structure design Specifications.
The first set wind speed, the second set wind speed, and the third set wind speed are all obtained through experiments, and in the present embodiment, the first set wind speed, the second set wind speed, and the third set wind speed are 14m/s, 22m/s, and 36m/s, respectively.
3. The first driving device controls the opening and closing angle of the movable blade 7 according to the control instruction, the ventilation rate of the wind barrier system is adjusted, and the second driving device controls the rotation of the wind shield 6 according to the control instruction, the height of the wind barrier system is adjusted, so that the wind barrier system achieves the best posture, and the requirements of traffic safety, bridge safety, wind barrier system safety and wide visual field are met.
According to the control method, the posture (namely the wind barrier height and the wind penetration rate) of the wind barrier system is adjusted under different wind speeds, so that the wind barrier system meets the requirements of driving safety, bridge safety, wind barrier system safety and wide visual field at the optimal posture; different wind speeds correspond to different optimal postures of the wind barrier system, the whole wind barrier system is composed of a plurality of wind barrier units 15, under the condition that natural wind speeds are the same, the wind barrier units 15 at different positions possibly correspond to different wind speeds (the wind speed of the middle wind barrier unit 15 is relatively large, the wind speeds of the wind barrier units 15 at two sides are relatively small), therefore, even under the same natural wind speed, the wind barrier units 15 at different positions also have different optimal postures, the posture of the whole wind barrier system is dynamically adjusted according to the wind speed in a segmented mode, the system achieves the optimal posture, the requirements of driving safety, bridge safety, wind barrier system safety, wide visual field and the like can be met at the same time, manual intervention is not needed in the middle process, automatic intelligent adjustment is achieved, and adjustment accuracy is high.
As shown in fig. 11, the method for controlling the intelligent adjustable wind barrier system on a bridge according to the present invention is described by taking a four-tower cable-stayed bridge as an example. In the middle and high wind speed section, 11 wind barrier postures shown in the table 1 are designed, and the optimal postures of the wind barrier system at different wind speeds, which meet the safety requirements of trains, bridges and wind barriers, are obtained by a method combining tests and numerical simulation. The workload of the step is large, and the test is carried out by adopting the test sequence designed in the tables 2 and 3, so that the workload can be greatly reduced.
Watch (A)
Attitude of wind shield
And in the middle wind speed section (14-22 m/s), the wind barrier and the bridge can meet the safety requirements, and only the train running safety is tested. In table 2, C represents the safety of the train determined by the train test. The numbers represent the test sequence, and the test is carried out from the lower left corner to the upper right corner to determine the safety of the train. And when the train safety meets the requirements on a certain oblique line (such as C _ 7-C _10 in the table 2), stopping the test, and considering that the working condition at the upper right side of the oblique line can meet the requirements on the train safety.
TABLE 2 wind speed segment test sequence
And testing the safety of the train, the bridge and the wind barrier at a high wind speed section (22-36 m/s). The specific test sequence is shown in table 3, wherein C, Q and F in table 3 represent tests performed on trains, bridges and windshields, respectively. The test is carried out on the train from the lower left corner to the upper right corner, the test is carried out on the bridge and the wind barrier from the lower right corner to the upper left corner, and the test is stopped when the safety on a certain inclined line meets the requirement.
TABLE 3 high wind speed section test sequence
The optimal wind barrier attitude parameters of the four-tower cable-stayed bridge at each wind speed obtained by the experiment are shown in table 4.
TABLE 4 optimal wind barrier attitude parameters at each wind speed for four-pylon cable-stayed bridge
The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or modifications within the technical scope of the present invention, and shall be covered by the scope of the present invention.
Claims (10)
1. The utility model provides an adjustable wind barrier system of intelligence on bridge, includes a plurality of wind barrier units, its characterized in that: each wind barrier unit comprises a base, a stand column, a first cross beam, a rotating shaft, a second cross beam, a wind shield, a plurality of movable blades, a rotating mechanism, a wind speed detection sensor, a control device, a first driving device, a second driving device and a power supply device;
one end of the upright post is arranged on the base, the other end of the upright post is connected with the first cross beam, and the first cross beam is parallel to the base; one end of the rotating shaft is rotatably connected with the upright post, the other end of the rotating shaft is connected with the second cross beam, and the second cross beam is parallel to the first cross beam; the wind shield is arranged on the rotating shaft; a first rotating shaft and a second rotating shaft are respectively arranged at the two transverse ends of each movable blade, a slide way is arranged on the side surface of the upright post, the first rotating shaft is slidably arranged in the slide way, and the second rotating shaft is rotatably arranged on the side surface of the upright post or in the slide way; each movable blade is parallel to the length direction of the base; an output shaft of the first driving device is connected with the first rotating shaft through a rotating mechanism; the output end of the second driving device is connected with the rotating shaft;
the wind speed detection sensor, the control end of the first driving device and the control end of the second driving device are respectively and electrically connected with the control device, and the power supply device is respectively and electrically connected with the power end of the wind speed detection sensor, the power end of the first driving device, the power end of the second driving device and the power end of the control device.
2. The intelligent on-bridge adjustable wind barrier system of claim 1, wherein: every movable vane all includes movable vane and fixed vane, be connected through the articulated shaft between movable vane and the fixed vane movable vane is equipped with first pivot along articulated shaft length direction's one end fixed vane is equipped with the second pivot along articulated shaft length direction's one end, first pivot and second pivot all are on a parallel with the articulated shaft, and keep away from the articulated shaft setting.
3. The intelligent on-bridge adjustable wind barrier system of claim 1, wherein: the rotating mechanism comprises a sliding rod, a main chain wheel, a driven chain wheel and a chain; the main chain wheel and the driven chain wheel are rotatably arranged on the side surface of the upright post, and the chain is wound on the main chain wheel and the driven chain wheel; the sliding rod is connected with the chain and the first rotating shaft of each movable blade; and the rotating shaft of the main chain wheel is connected with the output shaft of the first driving device.
4. The intelligent on-bridge adjustable wind barrier system of claim 1, wherein: the power supply device comprises a friction type nano generator, a storage battery, an emergency power supply and a power supply conversion module; the friction type nanometer generator and the emergency power supply are respectively and electrically connected with the storage battery, the input end of the power supply conversion module is respectively and electrically connected with the storage battery and the emergency power supply, and the output end of the power supply conversion module is respectively and electrically connected with the power end of the wind speed detection sensor, the power end of the first driving device, the power end of the second driving device and the power end of the control device;
preferably, the friction-type nano generator is embedded on the movable blade, and the storage battery is arranged on the base.
5. The intelligent on-bridge adjustable wind barrier system of claim 1, wherein: the inner side and the outer side of the wind barrier unit are respectively provided with a plurality of wind speed detection sensors, and the wind speed detection sensors arranged on the outer side of the wind barrier unit are far away from the wind barrier unit.
6. The intelligent on-bridge adjustable wind barrier system of any one of claims 1-5, wherein: and a steel wire is arranged between the base and the first cross beam along the vertical direction at intervals of 0.5 m.
7. A control method of the intelligent adjustable wind barrier system on the bridge according to any one of claims 1 to 6, characterized by comprising the following steps:
step 1: detecting a real-time wind speed on the bridge;
step 2: the control device generates a control instruction according to the real-time wind speed and the optimal posture corresponding to different wind speeds, and sends the control instruction to the first driving device and the second driving device;
and step 3: the first driving device controls the opening and closing angle of the movable blade according to the control instruction, the ventilation rate of the wind barrier system is adjusted, and the second driving device controls the rotation of the wind shield according to the control instruction, the height of the wind barrier system is adjusted, so that the wind barrier system can reach the optimal posture.
8. The method for controlling the intelligent adjustable wind barrier system on the bridge according to claim 7, wherein: in the step 2, the adjusting process of the optimal posture corresponding to different wind speeds is as follows:
when the real-time wind speed is less than or equal to a first set wind speed, the movable blades are controlled to be completely closed, the wind penetration rate of the wind barrier system is made to be maximum, whether the real-time wind speed is in a vortex vibration wind speed interval or not is judged, and if the real-time wind speed is in the vortex vibration wind speed interval, the wind shield is controlled to be everted, so that the wind shield serves as a flow restraining plate; otherwise, the wind shield is positioned at the horizontal position, so that the height of the wind shield system is minimum;
when the first set wind speed is less than the real-time wind speed and less than or equal to the second set wind speed, the wind shield is controlled to be positioned at the horizontal position, the movable blade is completely closed, and then the opening and closing angle of the movable blade is adjusted, namely the wind penetration rate of the wind barrier system is adjusted to meet the driving safety requirement;
when the second set wind speed is less than the real-time wind speed, the wind shield is controlled to be located at the vertical position, the movable blade is completely opened, and then the position of the wind shield is adjusted, namely the height of the wind barrier system is adjusted to meet the requirements of traffic safety, bridge safety, wind barrier system safety and wide visual field.
9. The method for controlling an intelligent adjustable wind barrier system on a bridge of claim 8, wherein: when the first set wind speed is less than the real-time wind speed and less than or equal to the second set wind speed, the set wind speed V is set1The initial value of the wind penetration rate D is a second set wind speed, the initial value of the wind penetration rate D is a maximum wind penetration rate, and the adjusting process of the wind penetration rate is as follows:
step 2.11, judging whether the vehicle is safe to drive, if not, increasing the opening and closing angle of the movable blade to enable D = D-delta D, wherein delta D is the adjustment quantity of the air permeability; otherwise, turning to step 2.12;
step 2.12 record the set wind speed V1The opening and closing angle of the lower movable blade is judged to set the wind speed V1Whether it is less than the first set wind speed, if not, V1=V1－ΔV1Let the air permeability D be the maximum air permeability and proceed to step 2.11, where Δ V1For setting wind speed V1The adjustment amount of (2); otherwise, turning to step 2.13;
step 2.13 setting different set wind speeds V1The opening and closing angle or the air permeability of the corresponding movable blade is stored in the control device, and the optimal air permeability of the wind barrier unit under different wind speeds in the section from the first set wind speed to the second set wind speed is obtained.
10. The method for controlling an intelligent adjustable wind barrier system on a bridge of claim 8, wherein: when the second set wind speed is less than the real-time wind speed, the set wind speed V is set2The initial value of height H is the maximum height, i.e. the wind deflector is located in a vertical position, the adjustment process of the height of the wind barrier system is:
step 2.21, judging whether the bridge and the wind barrier system are safe, if not, adjusting the wind shield to enable H = H-delta H, wherein delta H is the adjustment quantity of the height of the wind barrier system; otherwise, turning to step 2.22;
step 2.22, judging whether the vehicle is safe to drive, and if so, adjusting a wind shield by considering the view, the bridge safety and the wind barrier safety to enable H = H-delta H; otherwise, turning to step 2.23;
step 2.23, judging whether the vehicle driving safety judgment is carried out for the first time under the set wind speed, if so, closing the traffic, and controlling the wind shield to be positioned at the horizontal position and the movable blade to be completely closed when the wind speed is greater than or equal to the set wind speed; otherwise, turning to step 3.24;
step 2.24 recording the set wind speed V2The last height when the lower vehicle is not safe to drive is used for judging the set wind speed V2Whether the wind speed is greater than a third set wind speed, the third set wind speed is greater than a second set wind speed, if not, V2=V2+ΔV2Let the height H be the maximum height and proceed to step 2.21, where Δ V2For setting wind speed V2Otherwise, the step 2.25 is carried out;
step 2.25 setting different wind speeds V2The corresponding height of the wind barrier system is stored in the control device, namely the optimal height of the wind barrier unit under different wind speeds in the section from the second set wind speed to the third set wind speed is obtained.
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| CN112411369B (en) * | 2020-11-18 | 2022-04-22 | 同济大学 | Bridge railing structure with adjustable ventilation rate |
| CN112554540A (en) * | 2020-12-01 | 2021-03-26 | 上海建工四建集团有限公司 | Ventilation device capable of adjusting ventilation rate |
| CN113073548A (en) * | 2021-04-12 | 2021-07-06 | 同济大学 | Active pneumatic wing grid railing structure and control method thereof |
| CN113174835A (en) * | 2021-04-19 | 2021-07-27 | 同济大学 | Bridge flow restraining plate with adjustable pitch angle and ventilation rate and bridge |
| CN113737632A (en) * | 2021-08-28 | 2021-12-03 | 谷青茹 | Medium-sized suspension bridge protection device with bridge vortex vibration resisting structure |
| CN113737632B (en) * | 2021-08-28 | 2023-11-17 | 福建领航建设集团有限公司 | Medium-sized suspension bridge protector with anti bridge vortex structure that shakes |
| CN114427187A (en) * | 2022-03-09 | 2022-05-03 | 长沙理工大学 | Intelligent adjustable anti-dazzle plate for inhibiting bridge vortex vibration, control system and method |
| CN114427187B (en) * | 2022-03-09 | 2023-10-20 | 长沙理工大学 | Intelligent adjustable anti-dazzle plate for inhibiting bridge vortex vibration, control system and method |
| CN115478469A (en) * | 2022-09-30 | 2022-12-16 | 高速铁路建造技术国家工程研究中心 | Vibration-suppressing flow-guiding device |
| CN115478469B (en) * | 2022-09-30 | 2023-08-25 | 高速铁路建造技术国家工程研究中心 | Vibration-suppressing flow guiding device |
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